Can you elaborate please on which JVC tips you are using please and thank you?

I can honestly say, that I share the experience with you.
These headphones are remarkable. Though it may differ for people who can't get their calibration process straight.

One question though: did you ever run into the problem, that the overall volume, that is controlled by the mobile phone in my case, is generally pretty low? I had the case, that I turned the volume all the way up, and it seemed to be only about 50% of what I usually get from these.

Thanks and best regards!

@Elzizo : he was referring to JVC Spiral Dots. They are the best sounding IEM tips in my opinion as well.

@zorniki were you using the wired connection, or bluetooth? If bluetooth, reboot everything. If wired, you need amp